Description

The Mercia Harlow 4m x 3m Insulated Garden Room has an ultra-modern design with striking wing sides. The flat roof, double glazed 2 top opening front windows, 2 fixed side windows, double doors, and beautiful finish make this a luxury garden room. Free garden room installation is included within the price, simply place your order, and we will handle everything for you.

A modern garden room is an excellent way to create more living space. The open-plan outdoor garden room allows you to add various furniture pieces. You can add a desk and make it a garden office. Furnish it with a bed and accessories for a guest space, or use it as the perfect garden gym with exercise equipment. The insulated walls, roof, and floor make it a comfortable room to use all year round. The walls have a panel that allows you to conceal office wiring and other cables to give the interior a clutter-free finish. 

The front's geometric shape and wing design give you a sheltered entrance and verandah. It's ideal for rainy days and helps shade the front to keep the interior cool on sunny days. The luxury garden room has a flat roof with a waterproof rubber membrane. The cover is designed to last 50 years, so relax and enjoy whatever the weather. 

The Sherwood Harlow's unique look and superior finish make this one of the best garden rooms available. You can visit our Nottingham showroom, where you will be able to take a look at a Mercia Insulated Garden Room and see the incredible quality for yourself.

Optional UPVC Windows and Doors

Mercia's Insulated Garden Rooms with UPVC windows and doors are an excellent choice. Choose from anthracite, oak, or white to personalise your garden building effortlessly. UPVC provides enhanced security with its lightweight yet strong frame, advanced locking systems, and double-glazed panels that deter break-ins. Considering energy efficiency, these UPVC frames with double-glazing, ensuring a warm, quiet, and efficient space suitable for year-round enjoyment.

Also available:
Mercia Harlow Insulated Garden Room is available in sizes: 3m x 4m, 4m x 3m, 4m x 4m, 5m x 3m, 5m x 4m, 6m x 3m, 6m x 4m

Features:

Guarantee - 10-year anti-rot

Walls - 100mm double skinned walls insulated with (internal 12mm tongue and groove + 72mm framing + external 16mm Shiplap+ and EcoQuilt Insulation)

Floor - high quality 16mm tongue and groove floor with Air Tec Insulation between the bearers

Roof - pent tongue and groove roof with EcoQuilt Insulation and a rubber roof membrane provided

Windows - 4 double glazed windows

Doors - double glazed french doors 

Lock - mortise lock and key (keys provided)

Treatment - untreated (application of preservative and waterproof coat required)

Make the Most of Your Garden Room:

The Mercia Harlow 4m x 3m Insulated Garden Room is a simple way to increase your home's usable space. The insulated walls, floor, and roof make this a year-round garden room that is a comfy retreat in all weather. Add some electrics and a small heater for a cosy winter garden room. The windows and glazed doors flood the interior with light, perfect for a garden office or craft room. There is lots of room for adding bedroom furniture to make it a guest suite. Make it an outdoor dining area for use all year by adding a table and chairs. 

About Your Order:

The Mercia Harlow Garden Room is a UK-made insulated garden room that features sustainably sourced timber. You get a top-quality garden room with a low carbon footprint. High-quality timbers are used throughout the construction of the garden building. Mercia garden rooms are installed by a team of professional installers. The garden room is supplied untreated and will need an application of wood preservative immediately after installation. 

Please note: Images may show the garden room painted and may depict furnishings and accessories; these are for illustration purposes only and are not included with your order.

Garden Room Aftercare:

The garden room is supplied untreated. You must apply a preservative and waterproofing topcoat immediately after installation. Using the treatment after installation, followed by consistent annual treatment of the garden room, will maintain the high-quality finish and is a requirement of the 10-year anti-rot guarantee. A 1-year manufacturer's warranty is included as standard.

To treat the garden room, elbec recommends Protek wood treatment. Browse our Protek Royal Exterior Wood Finish Paint range to find the best paint colour to add your own personalised finish.  We’ve also included in the options section some popular colours and a Wood Preserver+ to be used underneath the colour of your choice.

Does A Garden Room Require Planning Permission?

The garden building designs have been created to adhere to planning permission guidelines. However, we cannot guarantee that you will not need planning permission for a garden building.  We advise checking with your local authorities before constructing your garden room. 

What Garden Room Base Do I Need?

A flat, level base is required for the installation of your Insulated Garden Room. You can purchase the Mercia Elite Timber Base With Ground Screws.  For more information on how to build a garden room base, you can contact us.

Prior to the Garden Room installation, be sure to check the base is level in all directions. If the base is not level, it will cause the building to twist and warp with the natural movement of the timber. It’s essential to adjust your base accordingly to achieve this before the installation process begins.

Please ensure there is a 24-inch clearance around the entire structure. This space is essential for both the assembly process and for future maintenance, such as treating the exterior.

Note: The installation team will not dismantle or remove any old buildings.

Customisable Garden Room:

The Mercia garden room range is versatile and customisable. If there is something you want to change about your garden room design, let us know! Want more windows? OK. Would you prefer to move the door location? We can do that. To create the perfect garden room design just for you, call us, and we can discuss the options.

About Mercia:

Mercia is one of the best UK garden building manufacturers. They have over 140 years of experience, so you get a summerhouse of the highest quality when choosing Mercia. Mercia combines the latest manufacturing techniques with the best hardwearing materials to produce British-made sheds and summerhouses built to the highest standards.

Every product Mercia produces is made with safety and exceeding your expectations in mind. When you receive your order, you will immediately see why this is one of the best summerhouse and shed manufacturers. All products are made from ethically sourced materials. 

View other products in All Summerhouses »

Delivery

Since installation is included at no extra cost, setting up your new garden room couldn’t be simpler.

After placing your order, you will be contacted and supplied with a short pre-installation form. This quick check helps us confirm that the location you’ve chosen is suitable, ensuring everything runs smoothly when our fitters arrive to assemble your Insulated Garden Room.

A solid, level foundation is essential. You can either prepare your own base, concrete or paving slabs are ideal, or choose the Elite Timber Base upgrade for a hassle-free solution.

For installation to run smoothly, please ensure there is at least 24 inches of clear space around the entire building. This clearance not only allows our team to complete the setup safely and efficiently, but also makes it easier for you to treat and maintain the exterior of your Garden Room once installation is complete.

Once we’ve confirmed that the groundwork and access to your garden are ready, we’ll be in touch to arrange a delivery and installation date that works around your schedule.

Before Delivery
On the morning of your scheduled delivery, you’ll receive a text message with a 2-hour estimated arrival window. (This service is available only if a mobile number was provided at checkout).

On the Day
Your Garden Room will arrive on a 3.5T, 7.5T, or 18T lorry, depending on the size of your order. For safety and insurance reasons, our installation team is unable to carry the building through your property. This avoids any risk of accidental damage to your home.

Specification

Quickview

The 4m x 3m Mercia Harlow Insulated Garden Room features a unique wing design that will create a stunning feature in your garden. It’s made for all-year use thanks to the 100mm thick double-skinned walls containing Eco-quilt multi-foil insulation. The key features include:

• Free Home Installation
• 14mm double glazed windows with 2 top opening front windows and 2 fixed side windows
• Ultra-modern wing design
• EcoQuilt insulated walls and roof
• Air Tec Insulated floor
• Customisable design
• 16mm Tongue and groove floor
• Solid Sheet Board & Interlocking Tongue and Groove Roof
• 10-year anti-rot guarantee